Nissan Murano. Manual - part 363

U1000 CAN COMM CIRCUIT

DLK-63

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

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DLK

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DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

BCM

BCM : Description

INFOID:0000000009718916

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN H-line, CAN L-line) allowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to 

LAN-29, "CAN Communication Signal Chart"

.

BCM : DTC Logic

INFOID:0000000009718917

DTC DETECTION LOGIC

BCM : Diagnosis Procedure

INFOID:0000000009718918

1.

PERFORM SELF DIAGNOSTIC

1.

Turn ignition switch ON and wait for 2 seconds or more.

2.

Check “Self Diagnostic Result”.

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-18, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-44, "Intermittent Incident"

.

AUTOMATIC BACK DOOR CONTROL UNIT

AUTOMATIC BACK DOOR CONTROL UNIT : Description

INFOID:0000000009718919

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN H-line, CAN L-line) allowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to 

LAN-29, "CAN Communication Signal Chart"

.

AUTOMATIC BACK DOOR CONTROL UNIT : DTC Logic

INFOID:0000000009718920

DTC DETECTION LOGIC

AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure

INFOID:0000000009718921

1.

PERFORM SELF DIAGNOSTIC

DTC

CONSULT display de-

scription

DTC Detection Condition

Possible cause

U1000

CAN COMM CIRCUIT

When BCM cannot communicate CAN com-
munication signal continuously for 2 seconds 
or more.

CAN communication system

DTC

CONSULT display de-

scription

DTC Detection Condition

Possible cause

U1000

CAN COMM CIRCUIT

When automatic back door control unit cannot 
communicate CAN communication signal con-
tinuously for 2 seconds or more.

CAN communication system

DLK-64

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

U1000 CAN COMM CIRCUIT

1.

Turn ignition switch ON and wait for 2 seconds or more.

2.

Check “Self Diagnostic Result”.

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-18, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-44, "Intermittent Incident"

.

U1010 CONTROL UNIT (CAN)

DLK-65

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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DLK

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U1010 CONTROL UNIT (CAN)

BCM

BCM : DTC Logic

INFOID:0000000009718922

DTC DETECTION LOGIC

BCM : Diagnosis Procedure

INFOID:0000000009718923

1.

REPLACE BCM

When DTC [U1010] is detected, replace BCM.

>> Replace BCM. Refer to 

BCS-98, "Removal and Installation"

BCM : Special Repair Requirement

INFOID:0000000009718924

1.

REQUIRED WORK WHEN REPLACING BCM

Initialize control unit. Refer to CONSULT operation manual NATS-IVIS/NVIS.

>> Work end.

AUTOMATIC BACK DOOR CONTROL UNIT

AUTOMATIC BACK DOOR CONTROL UNIT : DTC Logic

INFOID:0000000009718925

DTC DETECTION LOGIC

AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure

INFOID:0000000009718926

1.

REPLACE BCM

When DTC [U1010] is detected, replace automatic back door control unit.

>> Replace automatic back door control unit. Refer to 

DLK-368, "Removal and Installation"

.

DTC

CONSULT display de-

scription

DTC Detection Condition

Possible cause

U1010

CONTROL UNIT (CAN)

BCM detected internal CAN communication circuit malfunction.

BCM

DTC

CONSULT display 

description

DTC Detection Condition

Possible cause

U1010

CONTROL UNIT 
(CAN)

Automatic back door control unit detected inter-
nal CAN communication circuit malfunction

Automatic back door control unit

DLK-66

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2401 IGNITION POWER SUPPLY CIRCUIT

B2401 IGNITION POWER SUPPLY CIRCUIT

Description

INFOID:0000000009718927

Automatic back door control unit receive ignition power supply condition signal from BCM via CAN communi-
cation, and compare the signal with ignition power supply condition of automatic back door control unit to
detect inflammation.

DTC Logic

INFOID:0000000009718928

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait for at least 1 second.

2.

Check “Self Diagnostic Result” with CONSULT.

Is DTC detected?

YES

>> Go to 

DLK-66, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009718929

1.

CHECK FUSE, FUSIBLE LINK AND CIRCUIT BREAKER

Check that the following fuse, fusible link and circuit breaker are not fusing.

Is the fuse fusing?

YES

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect automatic back door control unit connector.

3.

Check voltage between automatic back door control unit harness connector and ground.

Is the measurement value normal?

YES

>> INSPECTION END

NO

>> Repair or replace harness.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2401

IGNITION POWER 
SUPPLY CIRCUIT

When the automatic power back door control unit 
detects the following condition for 0.3 second or 
more
• Power supply condition (OFF) of automatic back 

door unit and Ignition position signal (ON) from 
BCM via CAN

• Fuse
• Harness or connectors

(Ignition power supply condition 
circuit is open or shorted)

Fuse No.

Signal name

3

Ignition power supply

(+)

(

−

)

Condition

Voltage

(Approx.)

Automatic back door control unit

Connector

Terminal

B8

9

Ground

Ignition switch

ON

Battery voltage